不同光合二氧化碳固定循环植物的 P(700)活性和叶绿素含量。
P(700) activity and chlorophyll content of plants with different photosynthetic carbon dioxide fixation cycles.
机构信息
Department of Biochemistry, University of Georgia, Athens, Georgia 30601.
出版信息
Plant Physiol. 1970 Jun;45(6):738-41. doi: 10.1104/pp.45.6.738.
Abstract
Representative plants containing either the reductive pentose phosphate cycle or the C(4) dicarboxylic acid cycle of photosynthetic carbon dioxide fixation have distinctly different contents of P(700) and chlorophylls a and b. With leaf extracts and isolated chloroplasts from C(4) cycle plants, the mean value of the relative ratio of P(700) to total chlorophyll was 1.83 and the mean value of the ratio of chlorophyll a to b was 3.89. The respective values in similar extracts and chloroplasts from pentose cycle plants are 1.2 and 2.78.It seems likely that these results are indicative of a more active Photosystem I or a different size photosynthetic unit in C(4) cycle plants than in the reductve pentose phosphate cycle plants.
摘要
具有还原性戊糖磷酸循环或 C(4)二羧酸循环的代表性光合作用固定二氧化碳的植物，其 P(700)和叶绿素 a、b 的含量明显不同。用 C(4)循环植物的叶片提取物和分离的叶绿体进行实验，P(700)与总叶绿素的相对比值的平均值为 1.83，叶绿素 a 与 b 的比值平均值为 3.89。而戊糖磷酸循环植物的类似提取物和叶绿体中的相应值分别为 1.2 和 2.78。这些结果表明，C(4)循环植物的光合作用系统 I 或光合作用单位比还原性戊糖磷酸循环植物的更为活跃，或者大小不同。
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